Recent content by mammal

  1. M

    Analyzing Complex Waveforms: Finding Amplitude, Frequency, and Time Period

    Apparently the "20 sin (50∏t)" is the fundamental part, and the "10 sin (100∏t)" is the second harmonic. There is also a further "+10 sin (150∏t)" added for a later stage of the question. Thanks for the help I've been able to figure out the answers now!
  2. M

    Analyzing Complex Waveforms: Finding Amplitude, Frequency, and Time Period

    I have worked out the frequency using ω=2πf on both terms and combining them, any ideas on the amplitude and time period? I'm not sure what the Fourier series is to be honest!
  3. M

    Analyzing Complex Waveforms: Finding Amplitude, Frequency, and Time Period

    Homework Statement A complex waveform is given by the equation: V[SIZE="1"]A=20 sin (50∏t) + 10 sin (100∏t) Determine the amplitude, frequency and time period of the fundamental and harmonic components. Homework Equations The sinusoidal voltage formula is v = V sin(2∏ft). In this...
  4. M

    Finding maximum allowable alternating stress using goodmans relation

    Any ideas? The entire assignment is due in on monday and this is all I'm having problems with.
  5. M

    Finding maximum allowable alternating stress using goodmans relation

    Homework Statement (b) A steel alloy has an ultimate tensile strength of 820MN/m2 and a fatigue endurance limit of 390MN/m2. The steel is used in a fatigue application in which the alternating stress is 0.3 times the mean stress. Using the Goodman method with a factor of safety of 1.5...